Rapid changes in northeastern tropical Pacific Ocean surface salinity due to trans-basin moisture transport in recent decades

Zheng, Yiling; Du, Yan; Chi, Jinling; Zhang, Yuhong; Xie, Shang‐Ping

doi:10.1007/s00382-020-05585-9

Cited by 3 publications

(4 citation statements)

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“…The NETP is also a key region that connects the tropical Pacific and Atlantic. The gap winds transport moisture westward from the Atlantic, converge with cross‐equatorial southerly winds, and affect ocean stratification in the ITCZ (Xie et al., 2008; Y. Zheng et al., 2020). The interannual variability of the NETP BLs and their role in the ENSO is still unclear and should investigated in the near future.…”

Section: Summary and Discussionmentioning

confidence: 99%

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The Impact of the Eastern Pacific Fresh and Warm Pools on the Bimodal Seasonality of Barrier Layers

Chi

et al. 2023

JGR Oceans

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Observations of Argo profiles and TAO/TRITON array confirm the significant seasonality of the barrier layer (BL) and temperature inversion (TI) in the northeastern tropical Pacific (NETP). Statistical result of the occurrence based on the Argo profiles reveals a bimodal variability of the BL, with two peaks in July and October. This bimodal seasonality of BL is attributed to the out‐of‐phase variations of the eastern Pacific fresh and warm pools. The fresh and warm pools both expand westward from May to July, when the Inter‐Tropical Convergence Zone (ITCZ) becomes intense and broad. Heavy rainfall is the dominant contributor to the extension of the fresh and warm pools, leading to a high frequency of thick BL (40%). This frequent thick BL provides a precondition for its another development after August. The fresh pool is stable from August to November, while the warm pool contracts sharply. The cold tongue becomes active due to a prevailing trade wind and horizontal advection transports surface cold water to the northeastern warm pool. This cold advection deepens the isothermal layer and contributes to a frequent TI (30%) and thick BL (46%). The results suggest that the ITCZ rainfall and northward cold advection from equator dominate the upper layer stratification of NETP in summer and autumn, respectively.

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Section: Summary and Discussionmentioning

confidence: 99%

“…The NETP is also a key region that connects the tropical Pacific and Atlantic. The gap winds transport moisture westward from the Atlantic, converge with cross-equatorial southerly winds, and affect ocean stratification in the ITCZ (Xie et al, 2008;Y. Zheng et al, 2020).…”

Section: Summary and Discussionmentioning

confidence: 99%

The Impact of the Eastern Pacific Fresh and Warm Pools on the Bimodal Seasonality of Barrier Layers

Chi

et al. 2023

JGR Oceans

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“…IPO is decadally varying climate patterns over the Pacific, which is a broader sea surface temperature (SST) pattern associated with Pacific‐wide SSTs. The anomalous salinity pattern affected by IPO illustrates that negative SSS anomalies are centered at the equator near the international dateline and positive anomalies are displaced from the far western Pacific, extending to the northeast Pacific and southeast Pacific (Chen et al., 2014; Li et al., 2019; Zheng et al., 2021). This horseshoe‐shaped salinity pattern is controlled by the IPO phase shift.…”

Section: Introductionmentioning

confidence: 99%

“…As previous studies reported, IPO has shifted into a negative phase since the late 1990s (Henley, 2017), which is characterized by northwest and southwest Pacific warming and eastern Pacific cooling. The strengthened and westward shifting of Walker circulation that is induced by cooled eastern tropical Pacific SST resulted in the decreased rainfall in Inter‐Tropical Convergence Zone (ITCZ) and the South Pacific Convergence Zone (SPCZ) (Du et al., 2015; Sun et al., 2021; Zheng et al., 2021).…”

Section: Introductionmentioning

confidence: 99%

Salinity Variability Modes in the Pacific Ocean From the Perspectives of the Interdecadal Pacific Oscillation and Global Warming

Shi

2022

JGR Oceans

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Ocean salinity is one of the most fundamental elements in physical oceanography and plays an important role in defining the state of the ocean. Salinity also offers key information on ocean geostrophic circulation and controls the formation of water masses and ocean stratification (Helber et al., 2010;Qin et al., 2015;Rao & Sivakumar, 2003;Wang & Zhang, 2012). Furthermore, ocean salinity also modulates ocean and climate variability (Katsura et al., 2013). Since ocean surface salinity is strongly dominated by freshwater exchange at the air-ocean interface (Yu, 2011), the variability of salinity can reflect the global freshwater budget and transport change, including the 86% of global evaporation that is from the ocean and the 78% of global precipitation that is from the air (Trenberth et al., 2007). On a global scale, over the last 50 years, sea surface salinity (SSS) changes reflect an intensification of the mean climatological SSS patterns (Sun et al., 2021). The amplifying surface salinity pattern induced by anthropogenic global warming is the result of the increased capacity of a warmer atmosphere (Held & Soden, 2006;Levang & Schmitt, 2015;Rhein et al., 2013). Thus, the climatological SSS tends to be the key fingerprint of the intensified global hydrological cycle. This means that the ocean freshens in precipitation-dominant areas and salinizes in evaporation-dominant areas (

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Sea surface salinity changes and trans-basin water vapor transport between the Atlantic and Pacific under CMIP6 abrupt-4xCO2 scenario

Sun

Du²

2022

Clim Dyn

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Rapid changes in northeastern tropical Pacific Ocean surface salinity due to trans-basin moisture transport in recent decades

Cited by 3 publications

References 75 publications

The Impact of the Eastern Pacific Fresh and Warm Pools on the Bimodal Seasonality of Barrier Layers

The Impact of the Eastern Pacific Fresh and Warm Pools on the Bimodal Seasonality of Barrier Layers

Salinity Variability Modes in the Pacific Ocean From the Perspectives of the Interdecadal Pacific Oscillation and Global Warming

Sea surface salinity changes and trans-basin water vapor transport between the Atlantic and Pacific under CMIP6 abrupt-4xCO2 scenario

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